An adjustable student chair

Abstract

This utility model relates to the field of teaching equipment technology, specifically to an adjustable student chair, comprising: a seat frame, the seat frame including a base, two parallel seat mounting tubes mounted on the top of the base via a lifting bracket, a seat surface slidably mounted on the top surface of the seat mounting tubes, a backrest bracket at the rear end of the seat mounting tubes, and a backrest on the front side of the backrest bracket, the backrest height being adjustable. In this utility model, by moving the seat surface back and forth, the seat depth can be adjusted to accommodate different thigh lengths, ensuring thigh support; by setting reinforcing ribs, the seat strength is ensured while the front end of the seat is raised, providing more thigh support; by moving the backrest up and down, the different back support needs of students can be met.

Description

Technical Field

[0001] This utility model relates to the field of teaching equipment technology, specifically to a student chair with adjustable sitting posture. Background Technology

[0002] Under normal circumstances, students spend most of their time in chairs every day. The comfort of desks and chairs can affect students' learning efficiency and physical health.

[0003] Traditional fixed-height student chairs cannot meet the needs of students of different heights and have been gradually phased out. Currently, most student chairs on the market are height-adjustable, and the corresponding desks are also height-adjustable, meeting the seating height requirements of most students.

[0004] However, adjustable seat height alone cannot guarantee correct posture. Students of different ages and developmental stages require different seat depths. With a fixed seat depth, younger, smaller students do not receive adequate lumbar support. Older, larger students, on the other hand, lack sufficient thigh support from the chair, making them prone to sliding their buttocks forward. Similarly, a fixed-height backrest is not adequately adaptable to students of different ages and body types. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a student chair with adjustable seating posture.

[0006] The technical solution of this utility model is:

[0007] An adjustable student chair includes:

[0008] A seat bracket includes a base, on the top of which two parallel seat mounting tubes are mounted via a lifting bracket. A seat surface is slidably mounted on the top surface of each seat mounting tube. A backrest bracket is located at the rear end of each seat mounting tube. A backrest is located on the front side of the backrest bracket. The height of the backrest is adjustable.

[0009] Preferably, the chair surface includes a seat plate, the bottom surface of which is provided with a reinforcing rib, the bottom surface of which is horizontal and abuts against the seat plate mounting tube, and the front side of the top surface of which is inclined upward at 5-10°.

[0010] Preferably, at least two first tube clamps are symmetrically provided on both sides of the bottom surface of the reinforcing rib. The first tube clamps are slidably connected to the mounting tube of the seat plate, and a first quick-release rod is provided at the opening of the first tube clamp.

[0011] Preferably, the chair back support includes two chair back mounting tubes, the ends of which are bent and threadedly connected to the seat plate mounting tubes, and the bending angle of the ends of the chair back mounting tubes is 75-85°.

[0012] Preferably, a fixed crossbar is connected to the top end of the chair back mounting tube.

[0013] Preferably, the backrest includes a back panel, and the two sides of the back of the back panel are slidably connected to the chair back mounting tube via sliding sleeves.

[0014] Preferably, the back panel is also slidably connected to the chair back mounting tube via a second pipe clamp, and a second quick-release lever is provided at the opening of the second pipe clamp.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] In this invention, the seat depth can be adjusted by moving the seat back and forth to accommodate different thigh lengths and ensure thigh support; by setting reinforcing ribs, the strength of the seat board is ensured while the front end of the seat board is raised to provide more support for the thighs; by moving the backrest up and down, the back support needs of different students can be met. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is an exploded view of the seat bracket structure in this utility model;

[0019] Figure 3 This is a schematic diagram of the chair surface structure in this utility model;

[0020] Figure 4 for Figure 3 Enlarged schematic diagram of the structure at point A in the middle;

[0021] Figure 5 This is a schematic diagram of the backrest structure in this utility model.

[0022] The meanings of the labels in the diagram are as follows:

[0023] 1. Seat frame; 11. Base; 12. Upright; 13. Adjustment hole; 14. Sliding bracket; 15. Seat plate mounting tube; 16. Backrest mounting tube; 17. Fixed crossbar;

[0024] 2. Seat surface; 21. Seat plate; 22. Reinforcing rib; 23. First pipe clamp; 24. First quick-release bar;

[0025] 3. Backrest; 31. Back panel; 32. Sliding sleeve; 33. Second reinforcing rib; 34. Second pipe clamp; 35. Second quick-release bar. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Example 1:

[0028] Please see Figure 1-5 The present invention will describe the above technical solution in detail through the following embodiments:

[0029] An adjustable student chair includes:

[0030] The seat support 1 includes a base 11. Two parallel seat mounting tubes 15 are mounted on the top of the base 11 via a lifting bracket. A seat surface 2 is slidably mounted on the top surface of the seat mounting tubes 15. A backrest bracket is provided at the rear end of the seat mounting tubes 15. A backrest 3 is provided on the front side of the backrest bracket. The height of the backrest 3 is adjustable.

[0031] The base 11 is made of at least three steel pipes welded together in an H shape. The lifting support includes a column 12, which is vertically welded to the left and right sides of the top surface of the base 11. Several adjustment holes 13 are provided through the left and right sides of the column 12.

[0032] The support column 12 is surrounded by a sliding bracket 14, which is made of at least three square steel tubes welded together in an H shape. The seat plate mounting tube 15 is welded to the top of the sliding bracket 14. The sliding bracket 14 and the support column 12 are fixedly connected by bolts. By adjusting the position of the adjustment hole 13 through which the bolts pass, the height of the sliding bracket 14 can be adjusted, thereby adjusting the height of the seat plate mounting tube 15, and thus adjusting the height of the chair surface 2, thereby achieving seat height adjustment.

[0033] The seat surface 2 includes a seat plate 21. The bottom surface of the seat plate 21 is provided with a reinforcing rib 22. The bottom surface of the reinforcing rib 22 is horizontal and abuts against the seat plate mounting tube 15. The front side of the top of the reinforcing rib 22 is inclined upward at 5-10°.

[0034] The seat plate 21 and the reinforcing rib 22 can be integrally molded from plastic material. The seat plate 21 has several circular through holes running through its top and bottom to improve air permeability.

[0035] In this embodiment, the top surface of the reinforcing rib 22 is tilted upward by 5°. The upward tilt of the top surface of the reinforcing rib 22 will cause the front side of the seat plate 21 to tilt upward, which can provide better support for the thigh.

[0036] At least two first pipe clamps 23 are symmetrically provided on both sides of the bottom surface of the reinforcing rib 22. The first pipe clamps 23 are slidably connected to the seat plate mounting tube 15. A first quick release rod 24 is provided at the opening of the first pipe clamp 23.

[0037] The first pipe clamp 23 is fixedly installed on the bottom surface of the reinforcing rib 22 by screws. The opening of the first pipe clamp 23 is trumpet-shaped, and it gets bigger as it goes down, which makes it easy for the first pipe clamp 23 to be snapped into the mounting tube 15 of the seat plate from above.

[0038] The distance between the two first clamps 23 on the same side is less than the length of the seat plate mounting tube 15, ensuring that the first clamps 23 will not come off when sliding along the seat plate mounting tube 15.

[0039] The first quick-release lever 24 employs a known combination of an eccentric handle and a screw. By rotating the eccentric handle, the opening size of the first clamp 23 can be adjusted, thereby changing the magnitude of the clamping force of the first clamp 23 on the seat plate mounting tube 15.

[0040] When the eccentric handle is turned downwards, the opening of the first pipe clamp 23 becomes larger and can slide. When the eccentric handle is turned upwards, the opening of the first pipe clamp 23 becomes smaller and cannot move, thus fixing the seat surface 2 and the seat plate mounting tube 15.

[0041] The chair back support includes two chair back mounting tubes 16. The ends of the chair back mounting tubes 16 are bent and threaded to the seat mounting tubes 15. The bending angle of the ends of the chair back mounting tubes 16 is 75-85°.

[0042] In this embodiment, the bending angle of the end of the backrest mounting tube 16 is set to 82 degrees. After installation, the upper part of the backrest mounting tube 16 tilts backward by 8°, ensuring comfort while providing good support.

[0043] A fixed crossbar 17 is connected to the top of the chair back mounting tube 16.

[0044] The fixed crossbar 17 is inverted U-shape, with both ends bent downwards at 90° and inserted into the top of the chair back mounting tube 16.

[0045] The fixed crossbar 17 restricts the rotation of the chair back mounting tube 16. The curved ends of the fixed crossbar 17 provide protection in the event of a collision and can also be used as handles during transport.

[0046] The backrest 3 includes a back panel 31, and the two sides of the back of the back panel 31 are slidably connected to the backrest mounting tube 16 via a sliding sleeve 32.

[0047] The back panel 31 has a second reinforcing rib 33 on the back side. The second reinforcing rib 33 and the back panel 31 are integrally molded from plastic material. The back panel 31 has several circular through holes to improve air permeability.

[0048] The sliding sleeve 32 is located on both sides of the second reinforcing rib 33 and is fixedly connected to the back plate 31 by screws. The sliding sleeve 32 is used to limit the sliding direction of the back plate 31.

[0049] The back panel 31 is also slidably connected to the backrest mounting tube 16 via a second clamp 34, and a second quick-release lever 35 is provided at the opening of the second clamp 34.

[0050] The second clamp 34 is fixedly connected to the back plate 31 by screws. The second quick-release lever 35, like the first quick-release lever 24, adopts a combination of an eccentric handle and a screw. The size of the opening of the second clamp 34 is adjusted by rotating the eccentric handle to fix the back plate 31.

[0051] Working principle:

[0052] Seat depth adjustment:

[0053] Loosen the first quick release lever 24 to enlarge the opening of the first tube clamp 23, push the seat plate 21, and slide the seat plate 21 along the seat plate mounting tube 15. When sliding towards the backrest 3, the seat depth decreases, and when moving away from the backrest 3, the seat depth increases.

[0054] After the seat 2 is adjusted to the appropriate position, rotate the eccentric handle of the first quick release lever 24 to reduce the opening of the first clamp 23 and fix the seat plate 21.

[0055] Backrest height adjustment 3:

[0056] Release the second quick-release lever 35 so that the back panel 31 can slide along the backrest mounting tube 16 using the sliding sleeve 32 to achieve height adjustment.

[0057] Seat height adjustment:

[0058] Release the fixing bolts between the sliding bracket 14 and the column 12, and adjust the position of the adjustment hole 13 through which the bolt passes to achieve height adjustment.

[0059] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A student chair with adjustable sitting position, characterized in that, include: A seat support (1) includes a base (11). Two parallel seat mounting tubes (15) are mounted on the top of the base (11) via a lifting bracket. A seat surface (2) is slidably mounted on the top surface of the seat mounting tubes (15). A backrest bracket is provided at the rear end of the seat mounting tubes (15). A backrest (3) is provided on the front side of the backrest bracket. The height of the backrest (3) is adjustable.

2. A student chair with adjustable sitting position as claimed in claim 1, characterized in that: The seat surface (2) includes a seat plate (21), and the bottom surface of the seat plate (21) is provided with a reinforcing rib (22). The bottom surface of the reinforcing rib (22) is horizontal and abuts against the seat plate mounting tube (15). The front side of the top of the reinforcing rib (22) is inclined upward at 5-10°.

3. A student chair with adjustable sitting position as claimed in claim 2, characterized in that: At least two first pipe clamps (23) are symmetrically provided on both sides of the bottom surface of the reinforcing rib (22). The first pipe clamps (23) are slidably connected to the seat plate mounting pipe (15). A first quick release rod (24) is provided at the opening of the first pipe clamp (23).

4. The student chair of claim 1, wherein: The chair back support includes two chair back mounting tubes (16), the ends of which are bent and threadedly connected to the seat mounting tube (15), and the bending angle of the ends of the chair back mounting tubes (16) is 75-85°.

5. A student chair with adjustable sitting position as claimed in claim 4, characterized in that: The top end of the chair back mounting tube (16) is connected to a fixed crossbar (17).

6. An adjustable student chair for sitting position as claimed in claim 4 wherein: The backrest (3) includes a back panel (31), and the back sides of the back panel (31) are slidably connected to the backrest mounting tube (16) via sliding sleeves (32).

7. A student chair with adjustable sitting position as claimed in claim 6, characterized in that: The back panel (31) is also slidably connected to the chair back mounting tube (16) via a second clamp (34), and a second quick-release lever (35) is provided at the opening of the second clamp (34).

Images